diff --git a/include/ob_object.h b/include/ob_object.h
index cd14ea0..1adad5d 100644
--- a/include/ob_object.h
+++ b/include/ob_object.h
@@ -91,7 +91,7 @@ typedef enum enum_obobjtype
  typedef
 #endif
 
-typedef enum enum_obcollationtype
+enum enum_obcollationtype
 {
   CS_TYPE_INVALID = 0,
   CS_TYPE_GBK_CHINESE_CI = 28,
@@ -112,7 +112,7 @@ typedef enum enum_obcollationtype
  typedef
 #endif
 
-typedef enum enum_obcollationlevel
+enum enum_obcollationlevel
 {
   CS_LEVEL_EXPLICIT = 0,
   CS_LEVEL_NONE = 1,
@@ -290,4 +290,4 @@ void set_varchar(ObObj *obj, const char *ptr, int32_t size);
 int serialize_ObObj(const ObObj *obj, char *buf, const int64_t buf_len, int64_t *pos);
 int deserialize_ObObj(ObObj *obj, const char *buf, const int64_t data_len, int64_t *pos);
 int64_t get_serialize_size_ObObj(const ObObj *obj);
-#endif
\ No newline at end of file
+#endif